Dortmund: Petrovskyi beats Yoo, takes the lead with two rounds to go

In an exciting seventh round, the A-Open in Dortmund saw IM Vadim Petrovskyi becoming the sole leader after obtaining an upset win over GM Christopher Yoo. A total of 11 players stand a half point back, though, as there are two more rounds to go at the 51st edition of the traditional chess festival. | Photos: Official website